I'm having the same problem at the moment.
I'm flying with CX from Amsterdam to Sydney

Before booking the tickets for myself and my kids, i called cathay amsterdam if my Fiancé could book the tickets with his CC. They advised me to call after booking the tickets if there was a PCC Check on the tickets. I did and the guy told me there wasnt and i could travel without the CC.

Looking at our tickets a few days ago and it said "Form of identity: CC. CA. XXX"
From memory the past few years i have been flying to syd it said "Form of Identity: None.

Thats why i called the eservice in Hong Kong because it made me wonder why it was there.

Cathay Hong Kong tells me they do want to see the credit card and told me that my fiance needs to go to the cathay office in sydney with the credit card. (glad i double checked).

My fiance in sydney payed for the tickets with Mastercard SecureCode. It isnt a hassle for him to go there, but what if i didnt check again...